2．5％高效氯氟氰菊酯WP防治十字花科蔬菜蚜虫的田间药效试验

The Field Efficacy Trials of lambda-Cyhalothrin 2.5% WP against Cruciferae Vegetables Aphides

通过北京、河北、江苏、山东四地的田间药效试验,对首家在中国取得"低毒"农药登记的2.5%高效氯氟氰菊酯WP以十字花科蔬菜蚜虫为防治靶标进行了田间防效测定。试验结果表明:2.5%高效氯氟氰菊酯WP对防治十字花科蔬菜蚜虫有较好的速效性和持效性;推荐制剂用量为300～450g/hm2,防效可在80%以上,持效期达10d,且对作物安全。

The field efficacy of lambda-cyhalothrin 2.5% WP against Cruciferae vegetables＇ aphides was tested in Beijing, Hebei, Jiangsu and Shandong. The results showed that lambda-cyhalothrin 2.5% WP had a preferably good quick and persistent efficacy, its recommended usage 300-450 g/hm^2 could kill more than 80% of the aphides and this efficacy could last for 10 days without safety problems to cruciferae vegetables.